Yes, potassium can be brittle depending on its form.
Boron is considered brittle in its pure elemental form.
No. Diamond is the hardest mineral and it is not malleable or plastic.
Zinc is malleable if you heat it to between 100 degrees C and 150 degrees C; outside that temperature range it's brittle. As to whether it's ductile...no, and that's immaterial anyway because the wire would break if you made any.
no, it is very brittle
Several metals are ductile and malleable.
malleable
Sulfur is brittle.
Doubtful. Ductile by definition means "not brittle, easily stretched, malleable".
Brittle
Brittle
Boron is considered brittle in its pure elemental form.
No, it is a semi conductor so it is not ductile.
Most metals are not brittle.
Non metals are brittle. They are neither malleable nor ductile.
Yes, metalloids are ductile they are also malleable, but is not shiny.
Barium is not malleable or ductile as it is a brittle metal. It does exhibit some lustre, giving it a shiny appearance.
Cesium is considered to be ductile rather than malleable or brittle. It can be drawn into wires without breaking, which is characteristic of ductile materials. However, cesium is also quite soft and can easily be cut with a knife, suggesting it does not exhibit the hardness typically associated with brittle materials. Overall, its properties align more with ductility.